diff --git a/README.md b/README.md
index bfbfa8ef..51e544d0 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,13 @@ Node-RED Watson Nodes for IBM Bluemix
 
 <a href="https://cla-assistant.io/watson-developer-cloud/node-red-node-watson"><img src="https://cla-assistant.io/readme/badge/watson-developer-cloud/node-red-node-watson" alt="CLA assistant" /></a>
 
+### New in version 0.5.14
+- Bump to latest version of watson-developer-cloud node.js sdk
+- Allow empty input into converse for Conversation Node
+- Endpoint can now be specified in Natural Language Understanding, Discovery and Discover Query Builder Nodes
+- Full Promises implementation for on input processing for Natural Language Understanding Node
+- Fix to node.error invocation in Conversation node.
+
 ### New in version 0.5.13
 - Personality Insights on Bluemix needed new path to node_modules
 
diff --git a/package.json b/package.json
index 089cfade..f43c626d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "node-red-node-watson",
-  "version": "0.5.13",
+  "version": "0.5.14",
   "description": "A collection of Node-RED nodes for IBM Watson services",
   "dependencies": {
     "alchemy-api": "^1.3.0",
@@ -11,7 +11,7 @@
     "temp": "^0.8.3",
     "qs": "6.x",
 	  "image-type": "^2.0.2",
-    "watson-developer-cloud": "^2.37.0",
+    "watson-developer-cloud": "^2.39.2",
     "kuromoji": "^0.1.1",
     "is-docx": "^0.0.3",
     "stream-to-array" : "^2.3.0"
diff --git a/services/conversation/v1.html b/services/conversation/v1.html
index da0ac7d9..75c15e00 100644
--- a/services/conversation/v1.html
+++ b/services/conversation/v1.html
@@ -59,6 +59,12 @@
         <input type="checkbox" id="node-input-multiuser" style="display: inline-block; width: auto; vertical-align: top;">
         <label for="node-input-multiuser" style="width: 70%;"> Multiple Users</label>
     </div>
+    <div class="form-row">
+        <label>&nbsp;</label>
+        <input type="checkbox" id="node-input-empty-payload" style="display: inline-block; width: auto; vertical-align: top;">
+        <label for="node-input-empty-payload" style="width: 70%;"> Permit empty payload</label>
+    </div>
+
     <div class="form-tips" id="conversation-form-tips">
       <strong>Note:</strong> When using with multiple users, <code>msg.user</code> must be set.<br>
       See info box for details.
@@ -140,6 +146,7 @@
               workspaceid: {value: ''},
               multiuser: {value: false},
               context: {value: true},
+              'empty-payload': {value: false},
               'default-endpoint' :{value: true},
               'service-endpoint' :{value: 'https://gateway.watsonplatform.net/conversation/api'}
             },
diff --git a/services/conversation/v1.js b/services/conversation/v1.js
index caf640f5..a78b2261 100644
--- a/services/conversation/v1.js
+++ b/services/conversation/v1.js
@@ -36,8 +36,8 @@ module.exports = function(RED) {
     } : null);
   });
 
-  function verifyPayload(node, msg) {
-    if (!msg.payload) {
+  function verifyPayload(node, msg, config) {
+    if (!(msg.payload || config['empty-payload'])) {
       node.status({
         fill: 'red',
         shape: 'ring',
@@ -188,7 +188,7 @@ module.exports = function(RED) {
 
   function processResponse(err, body, node, msg, config) {
     if (err !== null && body === null) {
-      node.error(err);
+      node.error(err, msg);
       node.status({
         fill: 'red',
         shape: 'ring',
@@ -237,7 +237,7 @@ module.exports = function(RED) {
 
       node.status({});
 
-      b = verifyPayload(node, msg);
+      b = verifyPayload(node, msg, config);
       if (!b) {
         return;
       }
diff --git a/services/discovery/v1-query-builder.html b/services/discovery/v1-query-builder.html
index 8fd8b482..46c690e4 100644
--- a/services/discovery/v1-query-builder.html
+++ b/services/discovery/v1-query-builder.html
@@ -49,6 +49,16 @@
         <input type="password" id="node-input-password" placeholder="Password">
     </div>
 
+    <div class="form-row credentials">
+        <label>&nbsp;</label>
+        <input type="checkbox" id="node-input-default-endpoint" style="display: inline-block; width: auto; vertical-align: top;">
+        <label for="node-input-default-endpoint" style="width: 70%;"> Use Default Service Endpoint</label>
+    </div>
+    <div class="form-row">
+        <label for="node-input-service-endpoint"><i class="fa fa-tag"></i> Service Endpoint</label>
+        <input type="text" id="node-input-service-endpoint" placeholder="https://gateway.watsonplatform.net/discovery/api">
+    </div>
+
     <div class="form-row">
         <label for="node-input-environment"><i class="fa fa-book"></i> Environment</label>
         <select type="text" id="node-input-environment" style="display: inline-block; vertical-align:middle; width: 70%;">
@@ -257,6 +267,15 @@
           }
       });
 
+      $('input#node-input-default-endpoint').change(function () {
+          var checked = $('input#node-input-default-endpoint').prop('checked')
+          if (checked) {
+              $('#node-input-service-endpoint').parent().hide();
+          } else {
+              $('#node-input-service-endpoint').parent().show();
+          }
+      });
+
     }
 
     // The dialog is about to be shown.
@@ -429,8 +448,13 @@
       var u = $('#node-input-username').val();
       var p = $('#node-input-password').val();
 
-      $.getJSON('watson-discovery-v1-query-builder/environments',
-                 {un: u, pwd: p}
+      var creds = {un: u, pwd: p};
+      var eChecked = $('input#node-input-default-endpoint').prop('checked')
+      if (!eChecked) {
+        creds.endpoint = $('#node-input-service-endpoint').val();
+      }
+
+      $.getJSON('watson-discovery-v1-query-builder/environments', creds
       ).done(function (data) {
         $('#something-went-wrong').hide();
         if (data.error) {
@@ -461,9 +485,14 @@
       var u = $('#node-input-username').val();
       var p = $('#node-input-password').val();
 
-      $.getJSON('watson-discovery-v1-query-builder/collections',
-                 {un: u, pwd: p,
-                  environment_id: disQB.environment_selected}
+      var creds = {un: u, pwd: p};
+      var eChecked = $('input#node-input-default-endpoint').prop('checked')
+      if (!eChecked) {
+        creds.endpoint = $('#node-input-service-endpoint').val();
+      }
+      creds.environment_id = disQB.environment_selected;
+
+      $.getJSON('watson-discovery-v1-query-builder/collections', creds
       ).done(function (data) {
         $('#something-went-wrong').hide();
         if (data.error) {
@@ -492,11 +521,15 @@
       var u = $('#node-input-username').val();
       var p = $('#node-input-password').val();
 
-      $.getJSON('watson-discovery-v1-query-builder/schemas',
-                 {un: u, pwd: p,
-                  environment_id: disQB.environment_selected,
-                  collection_id: disQB.collection_selected
-                 }
+      var creds = {un: u, pwd: p};
+      var eChecked = $('input#node-input-default-endpoint').prop('checked')
+      if (!eChecked) {
+        creds.endpoint = $('#node-input-service-endpoint').val();
+      }
+      creds.environment_id = disQB.environment_selected;
+      creds.collection_id = disQB.collection_selected;
+
+      $.getJSON('watson-discovery-v1-query-builder/schemas', creds
       ).done(function (data) {
         $('#something-went-wrong').hide();
         if (data.error) {
@@ -683,7 +716,10 @@
                 queryvalue3: {value: ''},
                 queryvalue3hidden: {value: ''},
                 passages: {value: false},
-                passageshidden: {value: false}
+                passageshidden: {value: false},
+                'default-endpoint' :{value: true},
+                'service-endpoint' :{value: 'https://gateway.watsonplatform.net/discovery/api'}
+
             },
             credentials: {
               username: {type:"text"} //,
diff --git a/services/discovery/v1-query-builder.js b/services/discovery/v1-query-builder.js
index de5b8f1b..7b2ca3dc 100644
--- a/services/discovery/v1-query-builder.js
+++ b/services/discovery/v1-query-builder.js
@@ -22,14 +22,15 @@ module.exports = function(RED) {
     DiscoveryV1 = require('watson-developer-cloud/discovery/v1'),
     serviceutils = require('../../utilities/service-utils'),
     dservice = serviceutils.getServiceCreds(SERVICE_IDENTIFIER),
-    username = null,
-    password = null,
     sUsername = null,
-    sPassword = null;
+    sPassword = null,
+    sEndpoint = 'https://gateway.watsonplatform.net/discovery/api';
+
 
   if (dservice) {
     sUsername = dservice.username;
     sPassword = dservice.password;
+    sEndpoint = dservice.url;
   }
 
   RED.httpAdmin.get('/watson-discovery-v1-query-builder/vcap', function(req, res) {
@@ -41,16 +42,20 @@ module.exports = function(RED) {
     var discovery = new DiscoveryV1({
       username: sUsername ? sUsername : req.query.un,
       password: sPassword ? sPassword : req.query.pwd,
+      url: req.query.endpoint ? req.query.endpoint : sEndpoint,
       version_date: '2017-08-01',
       headers: {
         'User-Agent': pkg.name + '-' + pkg.version
       }
     });
 
+    console.log('Getting Discovery Environments');
     discovery.getEnvironments({}, function(err, response) {
       if (err) {
+        console.log(err);
         res.json(err);
       } else {
+        console.log('Returning Envrionments');
         res.json(response.environments ? response.environments : response);
       }
     });
@@ -61,6 +66,7 @@ module.exports = function(RED) {
     var discovery = new DiscoveryV1({
       username: sUsername ? sUsername : req.query.un,
       password: sPassword ? sPassword : req.query.pwd,
+      url: req.query.endpoint ? req.query.endpoint : sEndpoint,
       version_date: '2017-08-01',
       headers: {
         'User-Agent': pkg.name + '-' + pkg.version
@@ -85,6 +91,7 @@ module.exports = function(RED) {
     var discovery = new DiscoveryV1({
       username: sUsername ? sUsername : req.query.un,
       password: sPassword ? sPassword : req.query.pwd,
+      url: req.query.endpoint ? req.query.endpoint : sEndpoint,      
       version_date: '2017-08-01',
       headers: {
         'User-Agent': pkg.name + '-' + pkg.version
diff --git a/services/discovery/v1.html b/services/discovery/v1.html
index b819f428..6ecfb541 100644
--- a/services/discovery/v1.html
+++ b/services/discovery/v1.html
@@ -33,6 +33,16 @@
         <input type="password" id="node-input-password" placeholder="Password">
     </div>
 
+    <div class="form-row credentials">
+        <label>&nbsp;</label>
+        <input type="checkbox" id="node-input-default-endpoint" style="display: inline-block; width: auto; vertical-align: top;">
+        <label for="node-input-default-endpoint" style="width: 70%;"> Use Default Service Endpoint</label>
+    </div>
+    <div class="form-row">
+        <label for="node-input-service-endpoint"><i class="fa fa-tag"></i> Service Endpoint</label>
+        <input type="text" id="node-input-service-endpoint" placeholder="https://gateway.watsonplatform.net/discovery/api">
+    </div>
+
     <div class="form-row">
         <label for="node-input-discovery-method"><i class="fa fa-book"></i> Method: </label>
         <select type="text" id="node-input-discovery-method" style="display: inline-block; width: 70%;">
@@ -357,6 +367,15 @@
         var method = $('#node-input-discovery-method').val();
         disV1.processSelectedMethod(method);
       });
+
+      $('input#node-input-default-endpoint').change(function () {
+          var checked = $('input#node-input-default-endpoint').prop('checked')
+          if (checked) {
+              $('#node-input-service-endpoint').parent().hide();
+          } else {
+              $('#node-input-service-endpoint').parent().show();
+          }
+      });
     }
 
     disV1.checkForPrepare = function () {
@@ -398,7 +417,9 @@
                 return: {value: ''},
                 description: {value: ''},
                 size: {value: 0},
-                'discovery-method': {value:'listEnvrionments'}
+                'discovery-method': {value:'listEnvrionments'},
+                'default-endpoint' :{value: true},
+                'service-endpoint' :{value: 'https://gateway.watsonplatform.net/discovery/api'}
             },
             credentials: {
               username: {type:'text'},
diff --git a/services/discovery/v1.js b/services/discovery/v1.js
index 29814c43..a2eb6dc5 100644
--- a/services/discovery/v1.js
+++ b/services/discovery/v1.js
@@ -26,7 +26,10 @@ module.exports = function (RED) {
     username = null,
     password = null,
     sUsername = null,
-    sPassword = null;
+    sPassword = null,
+    endpoint = '',
+    sEndpoint = 'https://gateway.watsonplatform.net/discovery/api';
+
 
   function checkParams(method, params){
     var response = '';
@@ -218,16 +221,21 @@ module.exports = function (RED) {
   }
 
   function executeMethod(node, method, params, msg) {
-    const discovery = new DiscoveryV1({
-      username: username,
-      password: password,
-      version_date: '2017-08-01',
-      headers: {
-        'User-Agent': pkg.name + '-' + pkg.version
-      }
-    });
+    var discovery = null, p = null,
+      serviceSettings = {
+        username: username,
+        password: password,
+        version_date: '2017-08-01',
+        headers: {
+          'User-Agent': pkg.name + '-' + pkg.version
+        }
+      };
 
-    var p = null;
+    if (endpoint) {
+      serviceSettings.url = endpoint;
+    }
+
+    discovery = new DiscoveryV1(serviceSettings);
 
     switch (method) {
     case 'createEnvrionment':
@@ -284,6 +292,7 @@ module.exports = function (RED) {
   if (dservice) {
     sUsername = dservice.username;
     sPassword = dservice.password;
+    sEndpoint = dservice.url;
   }
 
   RED.httpAdmin.get('/watson-discovery/vcap', function (req, res) {
@@ -303,6 +312,11 @@ module.exports = function (RED) {
       username = sUsername || this.credentials.username;
       password = sPassword || this.credentials.password;
 
+      endpoint = sEndpoint;
+      if ((!config['default-endpoint']) && config['service-endpoint']) {
+        endpoint = config['service-endpoint'];
+      }
+
       node.status({});
       initialCheck(username, password, method)
         .then(function(){
diff --git a/services/language_translator_identify/v2.html b/services/language_translator_identify/v2.html
index c03aaabe..044006cf 100644
--- a/services/language_translator_identify/v2.html
+++ b/services/language_translator_identify/v2.html
@@ -46,7 +46,7 @@
 </script>
 
 <script type="text/x-red" data-help-name="watson-language-translator-identify">
-    <p>Packaged in with release 0.5.11 of node-red-node-watson</p>
+    <p>Packaged in with release 0.5.14 of node-red-node-watson</p>
     <p>The Watson Language Translator service can be used to identify languages used in a text input. <p>
     <p>Node input : </p>
     <ul>
diff --git a/services/natural_language_understanding/v1.html b/services/natural_language_understanding/v1.html
index 25d23018..8ab999e2 100644
--- a/services/natural_language_understanding/v1.html
+++ b/services/natural_language_understanding/v1.html
@@ -30,6 +30,16 @@
         <input type="password" id="node-input-password" placeholder="Password">
     </div>
 
+    <div class="form-row credentials">
+        <label>&nbsp;</label>
+        <input type="checkbox" id="node-input-default-endpoint" style="display: inline-block; width: auto; vertical-align: top;">
+        <label for="node-input-default-endpoint" style="width: 70%;"> Use Default Service Endpoint</label>
+    </div>
+    <div class="form-row">
+        <label for="node-input-service-endpoint"><i class="fa fa-tag"></i> Service Endpoint</label>
+        <input type="text" id="node-input-service-endpoint" placeholder="https://gateway.watsonplatform.net/natural-language-understanding/api">
+    </div>
+
     <div class="form-row">
         <label for="node-input-features" style="width: 100%"><i class="fa fa-book"></i> Extract the following features: </label>
           <div style="float: left;">
@@ -200,7 +210,7 @@
       To override the model used for entities set
       <code>msg.nlu_options.entity_model</code>.
       To override the model used for relations set
-      <code>msg.nlu_options.relations_model</code>. 
+      <code>msg.nlu_options.relations_model</code>.
     </p>
     <br>
     <p>Results from the API service will made available
@@ -271,6 +281,10 @@
                                     + ', #node-input-semantic-keywords'
                                     + ', #node-input-maxsemantics'));
 
+
+    nluV1.CreateIListener($('#node-input-default-endpoint'),
+                                $('#nnode-input-service-endpoint'));
+
   }
 
   nluV1.checkForPrepare = function () {
@@ -318,7 +332,9 @@
               'semantic': {value: false},
               'semantic-entities': {value: false},
               'semantic-keywords': {value: false},
-              'maxsemantics' :{value: '50'}
+              'maxsemantics' :{value: '50'},
+              'default-endpoint' :{value: true},
+              'service-endpoint' :{value: 'https://gateway.watsonplatform.net/natural-language-understanding/api'}
             },
             credentials: {
               username: {type:"text"},
diff --git a/services/natural_language_understanding/v1.js b/services/natural_language_understanding/v1.js
index 76fab15e..587f8f34 100644
--- a/services/natural_language_understanding/v1.js
+++ b/services/natural_language_understanding/v1.js
@@ -37,7 +37,9 @@ module.exports = function (RED) {
     username = null,
     password = null,
     sUsername = null,
-    sPassword = null;
+    sPassword = null,
+    endpoint = '',
+    sEndpoint = 'https://gateway.watsonplatform.net/natural-language-understanding/api';
 
   function reportError(node, msg, message) {
     var messageTxt = message.error ? message.error : message;
@@ -45,7 +47,14 @@ module.exports = function (RED) {
     node.error(message, msg);
   }
 
-  function checkPayload(msg, options) {
+  function initialCheck(u, p) {
+    if (!u || !p) {
+      return Promise.reject('Missing Watson Natural Language Understanding service credentials');
+    }
+    return Promise.resolve();
+  }
+
+  function payloadCheck(msg, options) {
     var message = '';
     if (!msg.payload) {
       message = 'Missing property: msg.payload';
@@ -54,13 +63,18 @@ module.exports = function (RED) {
     } else {
       options['text'] = msg.payload;
     }
-    return message;
+    if (message) {
+      return Promise.reject(message);
+    }
+    return Promise.resolve();
   }
 
+
   function checkAdditonalMsgOptions(msg, options) {
     if (msg.nlu_options && msg.nlu_options.language) {
       options['language'] = msg.nlu_options.language;
     }
+    return Promise.resolve();
   }
 
   function checkFeatureRequest(config, options) {
@@ -79,7 +93,10 @@ module.exports = function (RED) {
         options.features[NLU_FEATURES[enabled_features[f]]] = {};
       }
     }
-    return message;
+    if (message) {
+      return Promise.reject(message);
+    }
+    return Promise.resolve();
   }
 
   function processConceptsOptions(config, features) {
@@ -158,17 +175,25 @@ module.exports = function (RED) {
       processKeywordsOptions(config, options.features);
       processSemanticRolesOptions(config, options.features);
     }
+    return Promise.resolve();
   }
 
   function invokeService(options) {
-    const nlu = new NaturalLanguageUnderstandingV1({
-      username: username,
-      password: password,
-      version_date: NaturalLanguageUnderstandingV1.VERSION_DATE_2017_02_27,
-      headers: {
-        'User-Agent': pkg.name + '-' + pkg.version
-      }
-    });
+    var nlu = null,
+      serviceSettings = {
+        username: username,
+        password: password,
+        version_date: NaturalLanguageUnderstandingV1.VERSION_DATE_2017_02_27,
+        headers: {
+          'User-Agent': pkg.name + '-' + pkg.version
+        }
+      };
+
+    if (endpoint) {
+      serviceSettings.url = endpoint;
+    }
+
+    nlu = new NaturalLanguageUnderstandingV1(serviceSettings);
 
     var p = new Promise(function resolver(resolve, reject){
       nlu.analyze(options, function(err, data) {
@@ -185,6 +210,7 @@ module.exports = function (RED) {
   if (service) {
     sUsername = service.username;
     sPassword = service.password;
+    sEndpoint = service.url;
   }
 
   RED.httpAdmin.get('/natural-language-understanding/vcap', function (req, res) {
@@ -207,34 +233,36 @@ module.exports = function (RED) {
       username = sUsername || this.credentials.username;
       password = sPassword || this.credentials.password;
 
-      if (!username || !password) {
-        message = 'Missing Watson Natural Language Understanding service credentials';
-      } else {
-        message = checkPayload(msg, options);
-      }
-
-      if (!message) {
-        checkAdditonalMsgOptions(msg, options);
-        message = checkFeatureRequest(config, options);
-      }
-
-      if (!message) {
-        checkFeatureOptions(msg, config, options);
-        node.status({fill:'blue', shape:'dot', text:'requesting'});
-        invokeService(options)
-          .then(function(data){
-            msg.features = data;
-            node.send(msg);
-            node.status({});
-          })
-          .catch(function(err){
-            reportError(node,msg,err);
-          });
+      endpoint = sEndpoint;
+      if ((!config['default-endpoint']) && config['service-endpoint']) {
+        endpoint = config['service-endpoint'];
       }
 
-      if (message) {
-        reportError(node,msg,message);
-      }
+      initialCheck(username, password)
+        .then(function(){
+          return payloadCheck(msg, options);
+        })
+        .then(function(){
+          return checkAdditonalMsgOptions(msg, options);
+        })
+        .then(function(){
+          return checkFeatureRequest(config, options);
+        })
+        .then(function(){
+          return checkFeatureOptions(msg, config, options);
+        })
+        .then(function(){
+          node.status({fill:'blue', shape:'dot', text:'requesting'});
+          return invokeService(options);
+        })
+        .then(function(data){
+          msg.features = data;
+          node.send(msg);
+          node.status({});
+        })
+        .catch(function(err){
+          reportError(node,msg,err);
+        });
 
     });
   }